In order to better understand the role of perceived available support in buffering the negative effects of workplace stressors, a new multidimensional measure of perceived available support, the SAWS, was developed. Initial item development and content validation were conducted, followed by scale evaluation and validation. Two samples of 190 and 170 nursing staff supported the hypothesized structure of the scale, and provided evidence for discriminant validity amongst the sub-constructs of source of support (e.g., support from supervisor) and supportive function (e.g., emotional support). Criterion-related validity of the SAWS constructs were supported by measures of network orientation and relationship closeness. Evidence for predictive validity was provided by examining the moderating effects of the SAWS constructs on the relationship between work-family conflict and adjustment outcomes. The final SAWS inventory assesses three sources of support, and within each source, assesses four distinct supportive functions.